I tried to make a 3D print of 48168 Technic Turntable Type 2 Top.
- Downloaded STL file
- sliced with Cura
Result: the innner circle of the obkect did only stay open when the object balanced on its side. turning it to platform the result was a closed innner gap as you can see in the first two pictures.
- sliced with Slic3r
Result: bad print but gap was open. See next two pictures.